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><H1
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NAME="SQL-DISCARD"
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>DISCARD</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN69897"
></A
><H2
>Name</H2
>DISCARD&nbsp;--&nbsp;discard session state</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN69902"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>DISCARD { ALL | PLANS | TEMPORARY | TEMP }</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN69904"
></A
><H2
>Description</H2
><P
>   <TT
CLASS="COMMAND"
>DISCARD</TT
> releases internal resources associated with a
   database session. These resources are normally released at the end
   of the session.
  </P
><P
>   <TT
CLASS="COMMAND"
>DISCARD TEMP</TT
> drops all temporary tables created in the
   current session.  <TT
CLASS="COMMAND"
>DISCARD PLANS</TT
> releases all internally
   cached query plans.  <TT
CLASS="COMMAND"
>DISCARD ALL</TT
> resets a session to
   its original state, discarding temporary resources and resetting
   session-local configuration changes.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN69912"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="LITERAL"
>TEMPORARY</TT
> or <TT
CLASS="LITERAL"
>TEMP</TT
></DT
><DD
><P
>      Drops all temporary tables created in the current session.
     </P
></DD
><DT
><TT
CLASS="LITERAL"
>PLANS</TT
></DT
><DD
><P
>      Releases all cached query plans.
     </P
></DD
><DT
><TT
CLASS="LITERAL"
>ALL</TT
></DT
><DD
><P
>      Releases all temporary resources associated with the current
      session and resets the session to its initial state.
      Currently, this has the same effect as executing the following sequence
      of statements:
</P><PRE
CLASS="PROGRAMLISTING"
>SET SESSION AUTHORIZATION DEFAULT;
RESET ALL;
DEALLOCATE ALL;
CLOSE ALL;
UNLISTEN *;
SELECT pg_advisory_unlock_all();
DISCARD PLANS;
DISCARD TEMP;</PRE
><P></P
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><DIV
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><A
NAME="AEN69932"
></A
><H2
>Notes</H2
><P
>    <TT
CLASS="COMMAND"
>DISCARD ALL</TT
> cannot be executed inside a transaction block.
   </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN69936"
></A
><H2
>Compatibility</H2
><P
>   <TT
CLASS="COMMAND"
>DISCARD</TT
> is a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> extension.
  </P
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